Convert KX250 to mini dune buggy

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I have this KX250 motor that i want to make a small, 1 seater, mini dune buggy for. So basically it'll be a shifter kart with suspension and a roll cage. I dont think i will have a problem building the chassis, but i do want to know if i should change the gearing. The gear now is stock. The stock gearing is very close ratio and I think maybe i should re-gear the transmission so that it pulls for longer in each gear.

What do you think?

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I don't know if I would want to rip a go cart with a KX250 motor in it!!

The thing would fly! I guess the dune buggy would weigh more and have a lot more rolling resistance, so it wouldn't be as brutal as the two wheeler...but still, that motor through that gearbox is strong. Maybe to hard to control with so much shifting.

How would you acomplish the shifting? Paddles on the steering?

Maybe a snowmobile clutch would work better. No shifting and variable ratio. Sounds like some wrenching.

Coo

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Hah, i know, i want it to rip. Im gonna build an aluminum chassis for the buggy so it stays light. And as for shifting goes, im just gonna have mechanical linkage going to the shifter lever. Itll be just like a car. Clutch pedal on foot, brake and gas on foot and shifter on hand lever. Itll just be synchronized shifting in a row unlike how a car can change gears using an X pattern.

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Hah, i know, i want it to rip. Im gonna build an aluminum chassis for the buggy so it stays light. And as for shifting goes, im just gonna have mechanical linkage going to the shifter lever. Itll be just like a car. Clutch pedal on foot, brake and gas on foot and shifter on hand lever. Itll just be synchronized shifting in a row unlike how a car can change gears using an X pattern.

Aluminum???? I hope that doesnt mean the roll cage as well........ you would have to build that thing hella strong..... even then i wouldnt really trust it, how thick are you thinking of building it out of?

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Aluminum???? I hope that doesnt mean the roll cage as well........ you would have to build that thing hella strong..... even then i wouldnt really trust it, how thick are you thinking of building it out of?

Well i dont know. I want it to be light as possible, because i want it to as fast and violent as possible. I dont know how much a steel chassis and 160lb driver will slow it down; especially in sand too. But i dont know if an aluminium will be too weak (i plan to jump it a few times). I have a friend who took a welding class this year at school, ill ask him what he thinks about steel versus aluminum.

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Build it out of steel unless you have a TIG welder. Aluminum work hardens and will eventually snap on you. Most new MX bikes use an aluminum frame but they have been engineered and tested long before the frame ever got to a customer.

Well i dont know. I want it to be light as possible, because i want it to as fast and violent as possible. I dont know how much a steel chassis and 160lb driver will slow it down; especially in sand too. But i dont know if an aluminium will be too weak (i plan to jump it a few times). I have a friend who took a welding class this year at school, ill ask him what he thinks about steel versus aluminum.